EP 0957532 B1 20020925 - Multiple frequency band antenna
Title (en)
Multiple frequency band antenna
Title (de)
Mehrfrequenzband-Antenne
Title (fr)
Antenne à bandes de fréquence multiples
Publication
Application
Priority
JP 13198298 A 19980514
Abstract (en)
[origin: EP0957532A2] An active array antenna system comprises a plurality of element antennas (101) and radio frequency circuits connected to the element antennas. The radio frequency circuits comprises first frequency converters (104) provided to correspond to the element antenna and converts the frequency between a carrier-wave frequency and a first intermediate-frequency by using a carrier-wave frequency band local signal, second frequency converters (110) provided to correspond to the element antenna and converts the frequency between the first intermediate-frequency signal and a second intermediate-frequency which is lower than the first intermediate frequency by using an intermediate-frequency band local signal, and a variable phase shifter circuit (113) for individually controlling the phases of the intermediate-frequency local signals which are supplied to the second frequency converters (110). A variable phase shifter circuit for beam scan can be constituted at a low cost so that an active array antenna system which can be realized at a low cost is provided. <IMAGE>
IPC 1-7
IPC 8 full level
H01Q 3/34 (2006.01); H01Q 3/36 (2006.01); H01Q 3/38 (2006.01); H01Q 3/42 (2006.01); H04J 1/00 (2006.01)
CPC (source: EP US)
H01Q 3/34 (2013.01 - EP US); H01Q 3/36 (2013.01 - EP US); H01Q 3/42 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
EP 0957532 A2 19991117; EP 0957532 A3 20000105; EP 0957532 B1 20020925; DE 69903091 D1 20021031; DE 69903091 T2 20030605; JP 4015750 B2 20071128; JP H11330841 A 19991130; US 6249249 B1 20010619
DOCDB simple family (application)
EP 99303787 A 19990514; DE 69903091 T 19990514; JP 13198298 A 19980514; US 31019899 A 19990512